<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>

</head>
<body>
    
    <div id="app">
        <h3>{{msg}}</h3>
        <button @click="msg++">累加</button>
    </div>
    <script>
        Vue.config.productionTip = false
        const vm = new Vue({
            el:'#app',
            data(){
                return {
                    msg:10
                }
            }
        })

    </script>
</body>
</html>